#!/bin/sh

# 定义环境变量
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.8.0_152/bin
export JAVA_HOME=/usr/java/jdk1.8.0_152
export CLASSPATH=$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin


# DEFINE

# 获取tomcat进程ID
TomcatID=$(ps -ef |grep /usr/local/tomcat2/bin |grep -v 'grep'|awk '{print $2}')

# tomcat启动程序(这里注意tomcat实际安装的路径)
StartTomcat=/usr/local/tomcat2/bin/startup.sh
TomcatCache=/usr/local/tomcat2/work

# 定义要监控的页面地址 
WebUrl=http://localhost:8081/sniffer/

# 日志输出
GetPageInfo=/tmp/TomcatMonitor.Info
TomcatMonitorLog=/tmp/TomcatMonitor.log

Monitor()
{
echo "[info]开始监控tomcat2...[$(date +'%F %H:%M:%S')]"
if [ $TomcatID ];then 
echo "[info]当前tomcat2进程ID为:$TomcatID,继续检测页面..."
# 检测是否启动成功(成功的话页面会返回状态"200")
	TomcatServiceCode=$(curl -s -o $GetPageInfo -m 10 --connect-timeout 10 $WebUrl -w %{http_code})
    if [ $TomcatServiceCode -eq 200 ];then
        echo "[info]页面返回码为$TomcatServiceCode,tomcat2启动成功,测试页面正常......"
    else
        echo "[error]tomcat2页面出错,请注意......状态码为$TomcatServiceCode,错误日志已输出到$GetPageInfo"
        echo "[error]页面访问出错,开始重启tomcat"
        kill -9 $TomcatID  # 杀掉原tomcat进程
        sleep 3
        rm -rf $TomcatCache # 清理tomcat缓存
        $StartTomcat
    fi
  else
    echo "[error]tomcat2进程不存在!tomcat开始自动重启..."
    echo "[info]$StartTomcat,请稍候......"
    rm -rf $TomcatCache
    $StartTomcat 
  fi
  echo "------------------------------"
}
Monitor>>$TomcatMonitorLog
